SYNTHESIS OF (-)-INDOLACTAM-V
SYNTHESIS OF (-)-INDOLACTAM-V
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DOI:
10.1039/p19920000823
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发表时间:
1992-04-07
期刊:
影响因子:
--
通讯作者:
WILLIAMS, DJ
中科院分区:
文献类型:
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作者:
MASCAL, M;MOODY, CJ;WILLIAMS, DJ
A stereospecific 7-step synthesis of (-)-indolactam V1 from tryptophan methyl ester is described. The key steps are the photocyclisation of the dichloroamide 6 to give the isomeric 7-hydroxy-7-isopropyl-pyrrolo[4,3,2-fg][3]benzazocines 16 + 18 and the nitrene-mediated ring expansion of the derived azide 5 to give the 9-membered imine 4. The synthesis is completed by stereoselective reduction of the imine bond and N-methylation.